# US 10,371,955 B2 · Illumination device having a lenticular lens sheet that is formed in a concave manner having a plano-convex cylindrical convex surface with a light source disposed within the convex surface

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 10,371,955 B2
- Document ID: US10371955B2
- Status: Granted
- Kind: B2
- Application number: 15/947,527
- Filed: 2018-04-06
- Published: 2018-08-09
- Granted: 2019-08-06
- Earliest claimed: 2015-10-09
- Assignees: FUJIFILM Corporation
- Applicants: FUJIFILM Corporation
- Inventors: Samito Nakamura; Hiromi Takenoshita; Daisaku Abiru; Shuji Ono
- Web page: https://patentgrep.com/patent/US10371955B2

## CPC

- B60Q 3/12: lighting onto the surface to be illuminated
- B60Q 3/16: Circuits; Control arrangements
- F21S 6/002: {Table lamps, e.g. for ambient lighting}
- F21S 8/06: by suspension
- F21V 5/04: of lens shape
- F21V 7/043: {with cylindrical surface}
- F21V 7/048: {with facets structure}
- G02B 3/00: Simple or compound lenses
- G02B 3/0043: {Inhomogeneous or irregular arrays, e.g. varying shape, size, height}
- G02B 3/005: {arranged along a single direction only, e.g. lenticular sheets (G02B3/0043 takes precedence)}
- G02B 3/08: with discontinuous faces, e.g. Fresnel lens {(diffractive Fresnel lenses G02B5/1876)}
- G02B 6/003: {Lens or lenticular sheet or layer}
- G02B 19/0066: {in the form of an LED array}
- G02B 27/0966: {Cylindrical lenses (cylindrical lenses per se G02B3/06)}
- F21S 9/02: the power supply being a battery or accumulator
- F21Y 2113/13: comprising an assembly of point-like light sources
- F21Y 2115/10: Light-emitting diodes [LED]
- B60Q: ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
- F21S: NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21V: FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- F21Y: INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED

## Abstract

Provided is a high decorative illumination device that utilizes a lenticular lens sheet. An illumination device includes a lenticular lens sheet and an LED light source. The lenticular lens sheet is curved in an X direction, and a convex surface is formed in a concave shape. The LED light source is positioned inside the convex surface of the lenticular lens sheet. First and second reflection components from first and second bright points which are acquired by reflecting irradiation light rays from the LED light source from plano-convex cylindrical lenses are incident on left and right eyes of an observer who observes the illumination device. The observer observes a virtual image as if a light emitter is present in a position in which the first and second reflection components cross each other.

## Claims

### Claim 1

An illumination device comprising:
a lenticular lens sheet that is acquired by arranging a plurality of plano-convex cylindrical lenses which extends in a first direction in a second direction perpendicular to the first direction, the lenticular lens sheet being curved in the first direction and having a convex surface of the plano-convex cylindrical lenses formed in a concave shape; and
a light source that is disposed inside the convex surface of the plano-convex cylindrical lenses,
wherein in a case where components acquired by reflecting light rays emitted from the light source from the convex surface include reflection components incident on left and right eyes of an observer positioned opposite to the lenticular lens with respect to the light source, bright points at which the reflection components are reflected from the convex surface form line-shaped light rays along the second direction.

### Claim 2 (depends on 1)

The illumination device according to claim 1,
wherein the light source is a point light source.

### Claim 3 (depends on 1)

The illumination device according to claim 1,
wherein the lenticular lens sheet is curved in an arc shape.

### Claim 4 (depends on 1)

The illumination device according to claim 1,
wherein a curvature of the lenticular lens sheet formed in the concave shape is changed as a distance from the light source becomes larger in the second direction.

### Claim 5 (depends on 4)

The illumination device according to claim 4,
wherein the curvature becomes smaller as the distance from the light source becomes larger in the second direction.

### Claim 6 (depends on 1)

The illumination device according to claim 1,
wherein a light reflection film that reflects light of the light source is formed on the convex surface of the lenticular lens sheet.

### Claim 7 (depends on 1)

The illumination device according to claim 1, further comprising:
a support member that supports a portion around a position of the lenticular lens sheet in which the light source is disposed.

### Claim 8 (depends on 7)

The illumination device according to claim 7,
wherein the support member includes a light shielding portion that blocks light emitted from the light source in a direction perpendicular to the second direction.

### Claim 9 (depends on 1)

The illumination device according to claim 1,
wherein color of the light source is variable.